A search for C P violation in charmless three-body Ξ − b → p K − K − decays is performed using p p collision data recorded with the LHCb detector, corresponding to integrated luminosities of 1     fb − 1 at a center-of-mass energy √ s = 7     TeV , 2     fb − 1 at √ s = 8     TeV and 2     fb − 1 at √ s = 13     TeV . A good description of the phase-space distribution is obtained with an amplitude model containing contributions from Σ ( 1385 ) , Λ ( 1405 ) , Λ ( 1520 ) , Λ ( 1670 ) , Σ ( 1775 ) and Σ ( 1915 ) resonances. The model allows for C P -violation effects, which are found to be consistent with zero. The branching fractions of Ξ − b → Σ ( 1385 ) K − , Ξ − b → Λ ( 1405 ) K − , Ξ − b → Λ ( 1520 ) K − , Ξ − b → Λ ( 1670 ) K − , Ξ − b → Σ ( 1775 ) K − and Ξ − b → Σ ( 1915 ) K − decays are also reported. In addition, an upper limit is placed on the product of ratios of Ω − b and Ξ − b fragmentation fractions and the Ω − b → p K − K − and Ξ − b → p K − K − branching fractions.

Search for CP violation in Ξb−→pK−K− decays / Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C. A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Aliouche, Z., Alkhazov, G., Alvarez Cartelle, P., Amato, S., Amhis, Y., An, L., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 104:5(2021). [10.1103/PhysRevD.104.052010]

Search for CP violation in Ξb−→pK−K− decays

Casse, G.;Sarti, A.;
2021

Abstract

A search for C P violation in charmless three-body Ξ − b → p K − K − decays is performed using p p collision data recorded with the LHCb detector, corresponding to integrated luminosities of 1     fb − 1 at a center-of-mass energy √ s = 7     TeV , 2     fb − 1 at √ s = 8     TeV and 2     fb − 1 at √ s = 13     TeV . A good description of the phase-space distribution is obtained with an amplitude model containing contributions from Σ ( 1385 ) , Λ ( 1405 ) , Λ ( 1520 ) , Λ ( 1670 ) , Σ ( 1775 ) and Σ ( 1915 ) resonances. The model allows for C P -violation effects, which are found to be consistent with zero. The branching fractions of Ξ − b → Σ ( 1385 ) K − , Ξ − b → Λ ( 1405 ) K − , Ξ − b → Λ ( 1520 ) K − , Ξ − b → Λ ( 1670 ) K − , Ξ − b → Σ ( 1775 ) K − and Ξ − b → Σ ( 1915 ) K − decays are also reported. In addition, an upper limit is placed on the product of ratios of Ω − b and Ξ − b fragmentation fractions and the Ω − b → p K − K − and Ξ − b → p K − K − branching fractions.
2021
B physics, Branching fraction, Flavor physics, Hadron-Hadron scattering (experiments)
01 Pubblicazione su rivista::01a Articolo in rivista
Search for CP violation in Ξb−→pK−K− decays / Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C. A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Aliouche, Z., Alkhazov, G., Alvarez Cartelle, P., Amato, S., Amhis, Y., An, L., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 104:5(2021). [10.1103/PhysRevD.104.052010]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1673367
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